US2394781A - Spraying machine - Google Patents

Description

Feb. 12, 1946.

R. JEFFORDS SPRAYING MACHINE Filed April 17, 1943 3 Sheets-Sheet 1 MM, w. N.

INVENTOR :Roland ATTORN EYS SPRAYING MACHINE l Filed April 17, 1943 I5 Sheets-Sheet 2 Feb. 12, 1946.

R; JEFFoRDs SPRAYING MACHINE v Filed April 17 1943 3 Sheets-Sheet 3 BVM ATTOR N EYS Patented Feb. 12, 1946 yUNITED STATES PATENT OFFICE4 SYRAYING MACHINE Roland J effords, Pamplico, S. C. Application April 17, 1943, Serial No. 483,423

y (Cl. 299-42) 1 Claim.

My invention relates to new and useful improvements in liquid spraying devices.

An important object of my invention is the provision cf a spraying device that is readily portable, that may be easily and expeditiously directed through a field to be sprayed and that includes means for eflicaciously discharging the liquid in an essentially ne spray on the plants growing in the eld.

Another object of my invention is to provide a spraying device of the above-mentioned character which is light and compact in construction. The lightness in weight facilitating the movement and guidance of the device as it traverses the field and the compactness of `construction reducing the number of moving parts to a minimum and promoting the inexpensive manufacture and efficient operation thereof.

Another object of my invention is to provide a portable spraying device of the above-mentioned character wherein the liquid receiving vparts thereoiF are uniquely associated to promote simplicity of construction and wherein the several parts may be easily disassembled and cleaned.

Other objects and advantages of my invention will be apparent during the course of the following description.

In the drawings, forming a part of this specification, and wherein like numerals are employed to designate like parts throughout the same,

Figure 1 is a longitudinal sectional view of a spraying device embodying my invention,

Figure 2 is a bottom plan View thereof,

Figure 3 is a transverse sectional view taken on the line 3--3 of Figure l, and

Figure 4 is an enlarged fragmentary View of the spray nozzle arrangement, parts of the arrangement being shown in elevation and parts in section for clearness of illustration.

In the accompanying drawings, wherein for the purpose of illustration, is shown a preferred embodiment of my invention, the numeral III designates a supporting frame preferably of angle or channel iron construction and of essentially rectangular formation in plan. The rearward end ofthe frame is supported by an axle I I journaled for rotation in the bearings I2. The opposite ends of the axle extend beyond the bearings and the traction wheels I3 are keyed, or otherwise xedly secured thereto, the periphery of the wheels I3 being preferably serrated, as illustrated in Figure l, to permit the same to obtain traction on the ground surface. The forward end of the frame is supported by a swivel castor I4 which is adapted to move about the pivot pin I5 in a manner to permit the frame to be readily guided in any direction. A bracket I6 extends forwardly of the frame and the distal end thereof is formed with an extending tongue II adapted to receive the attaching lug of a tractor or other suitable means for moving the support.

An essentially large rectangular tank I8 is supported above the frame IIl by the essentially heavy leaf springs I9. A spring I9 is disposed at each end of the tank and, as best illustrated in Figure 2, each extends transversely of the frame and has its opposite ends riveted, or otherwise secured thereto. The tank is adapted to be filled with a suitable liquid to be sprayed on a field of growing plants, and the upper end thereof is, therefore, provided with a circular filler opening 2D, An exteriorly screw-threaded annulus 2| is provided with a radial base flange 22 which encloses the opening 20 and is riveted, or otherwise secured to the tank and a closure cap 23 is proy vided with an internally screw-threaded annular skirt 24 adapted to threadedly engage the annulus 2l to close the opening, The cap 23 is formed centrally thereof with an extending boss 25, the periphery of which is formed with angularly related wrench receiving faces 25 to which a conventional wrench may be fitted for effecting application or removal of the cap from the annulus.

In order that the liquid within the tank may be continually stirred or agitated, I have provided a pair of rotating blades or ns 21 mounted for rotation with a spindle 28 operating through the stuffing boxes 29 in the side walls of the tank. Each of the blades is held in xed association with the spindle by means of a set screw 29', or the like, and collars 30 are carried by the shaft in abutting relation with the inner surface of the side walls of the tank to hold the spindler against longitudinal movement. As is well known to those versed in the art, the followers or glands of the stufng boxes may be selectively positioned or adjusted to compress the packing in a manner to prevent the liquid within the tank from having egress therefrom around the journaled portions of the spindle. The end 3| of the traction driven axle il extends beyond the wheel I3 and a sprocket 32 is xedly secured thereto for rotation therewith. The spindle 28 extends substantially beyond the side of the tank above and in front of the extending end SI of the axle and a sprocket 33 is similarly xedly secured thereto. An endless chain 34 connects the sprockets 32 and 33 whereby rotation of the axle will effect rotation of the blades 21 Within the tank to thoroughly agitate the liquid.

A compressor 35 is suspended from the transverse web 36 of the frame below the tank I8 by the strap 31. The compressor comprises a cylinder 36 having an open end 31 normally closed by the wall 38, which wall is detachably secured to the cylinder by means of the bolts 39, orrthe like. Mounted for reciprocation within the cylinder is a piston 40 and the piston rod 4l carried thereby operates through the stuffing box 42 in the end wall 38. The piston rod extends through an aligning bearing 43 mounted on the transverse brace 44 of the frame and pivotally attaches to the connecting rod 45. The end of the piston rod extending beyond the bearing 43 is provided with a bearing 46 which receives one end of the extending horizontal journal 41. Mounted on the other end of the journal and in spaced relation with the bearing 46v is a second bearing 4S carrying a stub spindle 49 which extends in spaced parallel relation with the piston rod and is slidahly received bythe bearing 50 carried by the brace 44. The journaled end I of the connecting rod 45 is pivotally connected to the journal 41 intermediate the bearings 46 and 48 and the `opposite end thereof is provided with an essentially large collar 52. An eccentric 53 rotates with the axle and within the collar 52 to impart a reciprocating motion to the piston 43.

Reciprocation of the piston within the cylinder will cause uid from within the tank I8 to be drawn into the cylinder through the pipes 54 and 55. The ends 56 and 51 of the pipes are connected to the opposite ends of the cylinder and the other ends thereof are connected to the bottom wall of the tank I8. Connecting with the pipes 54 and 55 intermediate their ends is a pipe 58 including a T-iitting 59 to which the discharge conduit 5U is connected. The conduit 60 extends upwardly to the top of the tank where it connects with a manually operated three-way control valve 15. A pipe 16 leads from the valve back into the tank and a pipe 11 extends from the valve to a spray nozzle system mounted at the front of the tank. The pipe 58 is provided at lopposite sides of the pipe BIJ with the check valves 58a seating in the direction of the pump cylinder 35, and the pipes 54 and 55 are provided with check valves 54a and 55a., respectively, seating in the direction of the tank I8, as clearly shown in- Figure 2. VThe arrangement of the check valves is such that the pump will, when in operation, draw the liquid from the tank and deliver it to the pipe ll.

A plurality of spray nozzles 6I are mounted on the standard 62 and are adapted t0 receive liquid from the discharge conduit 60. The standard 62 comprises a substantially T-shaped member the stem 53 of which is vertically adjustably mounted on the front end of the tank I8.

The stem is preferably positioned at substantially the middle of the tank so that the arms 54 and 55 extending at opposite sides thereof may position the nozzles laterally of the tank. Elongated sleeves 65 are slidably mounted on each of the armsA 64 and 65 and the sleeves may be held in a selected adjusted position thereon by the set screws 61. The pipe sections inserted in the opposite ends of the distributing conduit 68 are secured to the sleeves $6 by suitable connections and the conduit is connected intermediate its ends with the end 69 of the pipe 11. The nozzles 6| connect with the pipe sections of the conduit 678 at spaced intervals along their length and, by

moving the sleeves 66 along the arms 64 and 65,

the spray nozzles may be selectively positioned relative to the tank.

Of course, if the piston 4U is to force the liquid under pressure through the conduit 6l), check valves must be positioned in the pipes 54 and 55 above the juncture of the pipe 58 therewith. The check valves preferably seat upwardly under the inuence of a suitable spring means whereby the valve will be opened on the suction stroke of the piston and closed on the compression stroke thereof. Thus, when the piston is moving forwardly in the cylinder, the valve in the pipe 55 will be open to admit iluid from the tank into the portion of the cylinder rearwardly of the piston. As the piston moves toward the rearward end of the cylinder the valve in the pipe 55 will close and the valve in the pipe 54 will open to admit uid from the tank into the portion of the cylinder in frontof the piston. Movement of the piston toward the rearward end of the cylinder and closing of the valve in the pipe '55 will permit the iluid to be discharged through the pipe 58 and conduit 6B to the discharge nozzles 5I. To prevent the fluid from merely iiowing from one end of the cylinder to the other through the pipe 58, I Aprefer that a check valve be disposed in each arm of the fitting 59. Each of the Valves is adapted to seat in a direction away from the conduit 60 whereby the valve at the compression side of the conduit Will be opened and the valve at the suction side thereof will be closed by the rush of fluid from the cylinder and 1 through the conduit 50.

In operation, the apparatus is pulled through the fieldY by a tractor, a team of horses, or by any other Suitable means. Handles 13 extend rearwardly of the tank at opposite sides thereof in a manner to be readily grasped by an operator walking at the vrear of the tank. The operator, by leaning on one or the other of the handles may effect pivoting of the front castor I4 to guide the device either t0 the right or to the left. As the device movesalong the surface of the ground, the traction wheels i3 will rotate the axle which, in turn, will agitato the blades 21 within the tank through the medium of the endless chain 34 and reciprocate the piston 45 through the medium of the connecting rod 45. The rotation of the blades 2,1 will maintain' the liquid within the tank thoroughly mixed and agitated at all times and the reciprocation of the pistons 4G will assure a constant flow of the liquid to the spray nozzle 6l. The liquid will discharge from each of the spray nozzles in an essentially ne spray which will fall upon the leaves and stalks of the plants growing in the vicinity.

One advantage of the present arrangement is that the parts are uniquely assembled and corelated to permit the same to be readily cleaned. By removing the closure cap 23, the ends of the pipes 54 and 55 connecting with the tank, and the wall 38 of the cylinder, the interior of the tank, cylinder and connecting pipes may be easily ushed with water, or other cleansing uid. It is then a simple matter to connect these parts to again render the device in condition for further operation.

When the device is being moved from place to place and under such conditions that it would be undesirable to have the liquid from the tank discharging from the nozzles, the control valve 15 may be adjusted to divert the liquid back into the tank through the pipe 15. When the device is being normally operated, however, the valve ywill be adjusted to close communication with the pipe 16 and to direct the ow of fluid through the pipe 11 from whence it is carried to thefspray nozzles and discharged in a ne spray onto the plants being treated.

It is to be understood that the form of my invention, herewith shown and described, is to be taken as a preferred example of the same, and various changes in the size, shape and arrangement of parts may be resorted to without departing from the spirit of my invention, or scope of the appended claim.

Having thus described my invention, I claim:

A spraying machine comprising a tank supporting frame, a pump cylinder mounted on the frame beneath the tank and having a reciprocable piston, a. rod connected to the piston, a spindle secured to the outer end of the rod in parallel relation to the rod` bearings carried by the frame slidably receiving the rod and spindle, means for reciprocating the piston connected to the rod and spindle, a spray nozzle connected to the cylinder, and means establishing communication lbetween the cylinder and tank.

ROLAND JEFFORDS.

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